Maryland Code, Public Safety § 12-836

(a) An elevator contractor may not engage in the business of elevator installation, alteration, repair, or service work unless the work of the elevator contractor is covered by:

(b) An applicant for an elevator contractor license shall submit proof of the insurance required under subsection (a) of this section to the Board with the license application.

(c) Unless a licensee meets the insurance requirements of this section, the Board may not renew the license of a licensee to whom the insurance requirements of this section apply.

(d) A licensed elevator contractor shall give the Board notice of the cancellation of insurance at least 10 days before the effective date of the cancellation.